Add default build type and validate against default cmake build types

Author: gcuendet

CMakeLists.txt

@@ -2,7 +2,7 @@
 cmake_minimum_required(VERSION 3.17)
 project(Torch-TensorRT LANGUAGES CXX)
 
-# use c++14 
+# use c++17 
 set(CMAKE_CXX_STANDARD 17)
 
 # Build the libraries with -fPIC
@@ -12,6 +12,7 @@ if (DEFINED CMAKE_MODULE_PATH)
   set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} CACHE PATH "Path to the folder containing finders")
 endif()
 
+include(cmake/build_options.cmake)
 include(cmake/dependencies.cmake)
 include(cmake/paths.cmake)
 if(MSVC)

cmake/build_options.cmake

@@ -0,0 +1,28 @@
+# set CMAKE_BUILD_TYPE default value
+if(NOT CMAKE_CONFIGURATION_TYPES)
+    if("${CMAKE_BUILD_TYPE}" STREQUAL "")
+        set(CMAKE_BUILD_TYPE
+            "Release"
+            CACHE STRING "Build configuration" FORCE)
+    endif()
+endif()
+
+# validate CMAKE_BUILD_TYPE against default CMake build types
+set(VALID_BUILD_TYPES "Release" "Debug" "RelWithDebInfo" "MinSizeRel")
+if(NOT CMAKE_CONFIGURATION_TYPES)
+    list(FIND VALID_BUILD_TYPES "${CMAKE_BUILD_TYPE}" INDEX)
+    if(${INDEX} MATCHES -1)
+        message(
+            FATAL_ERROR
+                "Invalid build type. Valid types are [${VALID_BUILD_TYPES}]")
+    endif()
+endif()
+
+if(NOT CMAKE_CONFIGURATION_TYPES)
+    if(DEFINED CMAKE_BUILD_TYPE)
+        set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+                                                     ${VALID_BUILD_TYPES})
+    endif()
+endif()
+
+